Bøger af Shyamal Roy

Increase in the petroleum prices, projected increases in the world's energy demand and environmental awareness have shifted the research interest to the alternative fuel technologies. In particular, green diesel, vegetable oil/animal fat/waste oil and grease derived hydrocarbons in diesel boiling range, has become an attractive alternative to biodiesel- a mixture of fatty acid methyl esters, particularly due to its superior fuel properties that are similar to petroleum diesel. Hence, green diesel can be used as a drop-in fuel in the current diesel engines. The current technology for production of green diesel- hydrogenation of triglycerides and fatty acids over conventional hydrotreating catalysts suffers from fast catalyst deactivation in the absence of hydrogen combined with high temperatures and high fatty acid content in the feedstock. This book proposes a new technology- selective decarboxylation of brown grease, which is a mixture of fats and oils collected from waste water trap and rich in fatty acids, over a supported Fe/ Al2O3 catalyst that overcomes the green diesel production challenges.

Considering the scenario of lignocellulosic biomass process industries for the synthesis of biofuels and other chemicals from renewable biomass resources, the unique potentials of some ionic liquids to selectively dissolve biomass components or whole native biomass have been explored. This potential has reflected extensive study of ionic liquids for the pretreatment of different lingo-cellulosic biomass, mainly for the production of cellulosic biofuels. Cellulose is a natural compound that does not deconstruct at the temperature lower than its dissociation temperature. Strong intra- and inter-molecular hydrogen bonds in cellulose resisits its molecules from deconstruction in most common solvents. The study of green processing of cellulose is dire from the aspect of both sustainability and environmental safety. The study for dissolution of cellulose with ionic liquids provides new windows for the processing of this lignocellulosic biomass, nevertheless, some rudimentary and realistic problems should to be resolved in order to establish if this will finally be a renewable or green strategy.